#include "usart.h"

//////////////////////////////////////////////////////////////////////////
uint8_t USART0::readUCSRC()
{
	uint8_t ui8UCSRC;
	
#ifdef USART_SHAREDIO
	ui8UCSRC = UBRRH;
	ui8UCSRC = UCSRC;
#else
	ui8UCSRC = *m_vui8pUCSRC;
#endif

	return ui8UCSRC;
}

//////////////////////////////////////////////////////////////////////////
void USART0::setUCSRC( uint8_t ui8UCSRC )
{
#ifdef USART_SHAREDIO
	*m_vui8pUCSRC = ( 1 << URSEL ) | ui8UCSRC;
#else
	*m_vui8pUCSRC = ui8UCSRC;
#endif
}

//////////////////////////////////////////////////////////////////////////
void USART0::setRXState( bool bEnable )
{
	if( bEnable )
	{
		*m_vui8pUCSRB |= ( 1 << RXEN_D );
	}
	else
	{
		*m_vui8pUCSRB &= ~( 1 << RXEN_D );
	}
}

//////////////////////////////////////////////////////////////////////////
void USART0::setTXState( bool bEnable )
{
	if( bEnable )
	{
		*m_vui8pUCSRB |= ( 1 << TXEN_D );
	}
	else
	{
		*m_vui8pUCSRB &= ~( 1 << TXEN_D );
	}
}

//////////////////////////////////////////////////////////////////////////
void USART0::setBaudRate( uint32_t ui32BaudRate )
{
	uint16_t ui16UBRR = ( ( F_CPU / ( 16 * ui32BaudRate ) ) - 1 );
	*m_vui8pUBRRH = static_cast<uint8_t>( ui16UBRR >> 8 );
	*m_vui8pUBRRL = static_cast<uint8_t>( ui16UBRR );
}

//////////////////////////////////////////////////////////////////////////
void USART0::setDataBits( uint8_t ui8DataBits )
{
	uint8_t ui8UCSRC = readUCSRC();
	
	if( ui8DataBits < 5 )
	{
		ui8DataBits = 5;
	}
	else if( ui8DataBits > 9 )
	{
		ui8DataBits = 9;
	}
	
	if( ui8DataBits <= 8 )
	{
		bool bZeroBit = ( ui8DataBits - 5 ) & 1;
		bool bOneBit = ( ( ui8DataBits - 5 ) >> 1 ) & 1;
		
		if( bZeroBit )
		{
			ui8UCSRC |= ( 1 << UCSZ0_D );
		}
		else
		{
			ui8UCSRC &= ~( 1 << UCSZ0_D );
		}
		
		if( bOneBit )
		{
			ui8UCSRC |= ( 1 << UCSZ1_D );
		}
		else
		{
			ui8UCSRC &= ~( 1 << UCSZ1_D );
		}
		
		*m_vui8pUCSRB &= ~( 1 << UCSZ2_D );
	}
	else
	{
		ui8UCSRC |= ( 1 << UCSZ1_D ) | ( 1 << UCSZ0_D );
		*m_vui8pUCSRB |= ( 1 << UCSZ2_D );
	}
	
	setUCSRC( ui8UCSRC );
}

//////////////////////////////////////////////////////////////////////////
void USART0::setParity( Parity enmParity )
{
	uint8_t ui8UCSRC = readUCSRC();
	
	if( enmParity == Parity::DISABLED )
	{
		ui8UCSRC &= ~( ( 1 << UPM1_D ) | ( 1 << UPM0_D ) );
	}
	else if( enmParity == Parity::ODD )
	{
		ui8UCSRC |= ( ( 1 << UPM1_D ) | ( 1 << UPM0_D ) );
	}
	else if( enmParity == Parity::EVEN )
	{
		ui8UCSRC &= ~( ( 1 << UPM0_D ) );
		ui8UCSRC |= ( ( 1 << UPM1_D ) );
	}
	
	setUCSRC( ui8UCSRC );
}

//////////////////////////////////////////////////////////////////////////
void USART0::setStopBits( StopBit enmStopBits )
{
	uint8_t ui8UCSRC = readUCSRC();
	
	if( enmStopBits == StopBit::ONE )
	{
		ui8UCSRC &= ~( 1 << USBS_D );
	}
	else if( enmStopBits == StopBit::TWO )
	{
		ui8UCSRC |= ( 1 << USBS_D );
	}
	
	setUCSRC( ui8UCSRC );
}

//////////////////////////////////////////////////////////////////////////
void USART0::setMode( Mode enmMode )
{
	uint8_t ui8UCSRC = readUCSRC();

#ifdef USART_SPI
	if( enmMode == Mode::ASYNCHRONOUS )
	{
		ui8UCSRC &= ~( ( 1 << UMSEL1_D ) | ( 1 << UMSEL0_D ) );
	}
	else if( enmMode == Mode::SYNCHRONOUS )
	{
		ui8UCSRC &= ~( 1 << UMSEL1_D );
		ui8UCSRC |= ( 1 << UMSEL0_D );
	}
	else if( enmMode == Mode::MASTERSPI )
	{
		ui8UCSRC |= ( ( 1 << UMSEL1_D ) | ( 1 << UMSEL0_D ) );
	}
#else
	if( enmMode == Mode::ASYNCHRONOUS )
	{
		ui8UCSRC &= ~( 1 << UMSEL_D );
	}
	else if( enmMode == Mode::SYNCHRONOUS )
	{
		ui8UCSRC |= ( 1 << UMSEL_D );
	}
#endif

	setUCSRC( ui8UCSRC );
}

//////////////////////////////////////////////////////////////////////////
USART0::USART0()
{
#ifdef USART_SHAREDIO
	m_vui8pUCSRA = &UCSRA;
	m_vui8pUCSRB = &UCSRB;
	m_vui8pUCSRC = &UCSRC;
	m_vui8pUBRRH = &UBRRH;
	m_vui8pUBRRL = &UBRRL;
	m_vui8pUDR = &UDR;
#endif

#ifndef USART_SHAREDIO
	m_vui8pUCSRA = &UCSR0A;
	m_vui8pUCSRB = &UCSR0B;
	m_vui8pUCSRC = &UCSR0C;
	m_vui8pUBRRH = &UBRR0H;
	m_vui8pUBRRL = &UBRR0L;
	m_vui8pUDR = &UDR0;
#endif
}

//////////////////////////////////////////////////////////////////////////
USART0::~USART0()
{}

//////////////////////////////////////////////////////////////////////////
void USART0::init( uint32_t ui32BaudRate /* = 9600 */, uint8_t ui8DataBits /* = 8 */, Parity enmParity /* = Parity::DISABLED */, StopBit enmStopBits /* = StopBit::ONE */, Mode enmMode /* = Mode::ASYNCHRONOUS */ )
{
	setBaudRate( ui32BaudRate );
	setDataBits( ui8DataBits );
	setParity( enmParity );
	setStopBits( enmStopBits );
	setMode( enmMode );

	setRXState( true );
	setTXState( true );
}

//////////////////////////////////////////////////////////////////////////
bool USART0::receiveByte( unsigned char &chData, uint32_t ui32DelayMS )
{
	const uint8_t ui8ClockCyclesPerIteration = 6;
	double dDelayS = ui32DelayMS / 1000.0;
	
	uint32_t ui32Iterations = static_cast<uint32_t>( ( dDelayS * F_CPU ) / ui8ClockCyclesPerIteration );

	do
	{
		if( ( *m_vui8pUCSRA & ( 1 << RXC_D ) ) )
		{
			chData = *m_vui8pUDR;
			return true;
		}
	} while( --ui32Iterations > 0 );
	
	return false;
}

//////////////////////////////////////////////////////////////////////////
unsigned char USART0::receiveByte()
{
	while( !( *m_vui8pUCSRA & ( 1 << RXC_D ) ) );
	
	return *m_vui8pUDR;
}

//////////////////////////////////////////////////////////////////////////
string USART0::receiveLine( string strLineTerminator /* = "\r\n" */, size_t sizeMaxSize /* = 1024 */ )
{
	string strReceived;
	
	while( strReceived.length() < sizeMaxSize )
	{
		strReceived += receiveByte();
		
		size_t sizeLineTerminator = strReceived.rfind( strLineTerminator );
		
		if( sizeLineTerminator != string::npos )
		{
			strReceived = strReceived.substr( 0, sizeLineTerminator );
			break;
		}
	}
	
	return strReceived;
}

//////////////////////////////////////////////////////////////////////////
void USART0::receive( char &chReceived )
{
	chReceived = receiveByte();
}

//////////////////////////////////////////////////////////////////////////
void USART0::receive( unsigned char &uchReceived )
{
	uchReceived = receiveByte();
}

//////////////////////////////////////////////////////////////////////////
void USART0::receive( short int &shiReceived )
{
	long int liInput;
	receive( liInput );

	shiReceived = static_cast<short int>( liInput );
}

//////////////////////////////////////////////////////////////////////////
void USART0::receive( unsigned short int &ushiReceived )
{
	unsigned long int uliInput;
	receive( uliInput );

	ushiReceived = static_cast<unsigned short int>( uliInput );
}

//////////////////////////////////////////////////////////////////////////
void USART0::receive( int &iReceived )
{
	long int liInput;
	receive( liInput );

	iReceived = static_cast<int>( liInput );
}

//////////////////////////////////////////////////////////////////////////
void USART0::receive( unsigned int &uiReceived )
{
	unsigned long int uliInput;
	receive( uliInput );

	uiReceived = static_cast<unsigned int>( uliInput );
}

//////////////////////////////////////////////////////////////////////////
void USART0::receive( long int &liReceived )
{
	string strInput;
	unsigned char uchRead;

	while( !isspace( uchRead = receiveByte() ) )
	{
		strInput += uchRead;
	}

	liReceived = strtol( strInput.c_str(), nullptr, 10 );
}

//////////////////////////////////////////////////////////////////////////
void USART0::receive( unsigned long int &uliReceived )
{
	string strInput;
	unsigned char uchRead;

	while( !isspace( uchRead = receiveByte() ) )
	{
		strInput += uchRead;
	}

	uliReceived = strtoul( strInput.c_str(), nullptr, 10 );
}

//////////////////////////////////////////////////////////////////////////
void USART0::receive( long long int &lliReceived )
{
	long int liInput;
	receive( liInput );

	lliReceived = liInput;
}

//////////////////////////////////////////////////////////////////////////
void USART0::receive( unsigned long long int &ulliReceived )
{
	unsigned long int uliInput;
	receive( uliInput );

	ulliReceived = uliInput;
}

//////////////////////////////////////////////////////////////////////////
void USART0::receive( float &fReceived )
{
	double dInput;
	receive( dInput );

	fReceived = dInput;
}

//////////////////////////////////////////////////////////////////////////
void USART0::receive( double &dReceived )
{
	string strInput;
	unsigned char uchRead;

	while( !isspace( uchRead = receiveByte() ) )
	{
		strInput += uchRead;
	}

	dReceived = strtod( strInput.c_str(), nullptr );
}

//////////////////////////////////////////////////////////////////////////
void USART0::receive( long double &ldReceived )
{
	double dInput;
	receive( dInput );

	ldReceived = dInput;
}

//////////////////////////////////////////////////////////////////////////
void USART0::transmitByte( unsigned char byteData )
{
	while( !( *m_vui8pUCSRA & ( 1 << UDRE_D ) ) );
	
	*m_vui8pUDR = byteData;
}

//////////////////////////////////////////////////////////////////////////
void USART0::transmit( string strData )
{
	for( size_t i = 0; i < strData.length(); ++i )
	{
		transmitByte( strData[i] );
	}
}

//////////////////////////////////////////////////////////////////////////
void USART0::transmit( char chData )
{
	transmitByte( chData );
}

//////////////////////////////////////////////////////////////////////////
void USART0::transmit( unsigned char uchData )
{
	sprintf( m_szConvertBuffer, "%hhu", uchData );
	transmit( m_szConvertBuffer );
}

//////////////////////////////////////////////////////////////////////////
void USART0::transmit( short int shiData )
{
	sprintf( m_szConvertBuffer, "%hd", shiData );
	transmit( m_szConvertBuffer );
}

//////////////////////////////////////////////////////////////////////////
void USART0::transmit( unsigned short int ushiData )
{
	sprintf( m_szConvertBuffer, "%hu", ushiData );
	transmit( m_szConvertBuffer );
}

//////////////////////////////////////////////////////////////////////////
void USART0::transmit( int iData )
{
	sprintf( m_szConvertBuffer, "%d", iData );
	transmit( m_szConvertBuffer );
}

//////////////////////////////////////////////////////////////////////////
void USART0::transmit( unsigned int uiData )
{
	sprintf( m_szConvertBuffer, "%u", uiData );
	transmit( m_szConvertBuffer );
}

//////////////////////////////////////////////////////////////////////////
void USART0::transmit( long int liData )
{
	sprintf( m_szConvertBuffer, "%ld", liData );
	transmit( m_szConvertBuffer );
}

//////////////////////////////////////////////////////////////////////////
void USART0::transmit( unsigned long int uliData )
{
	sprintf( m_szConvertBuffer, "%lu", uliData );
	transmit( m_szConvertBuffer );
}

//////////////////////////////////////////////////////////////////////////
void USART0::transmit( long long int lliData )
{
	sprintf( m_szConvertBuffer, "%lld", lliData );
	transmit( m_szConvertBuffer );
}

//////////////////////////////////////////////////////////////////////////
void USART0::transmit( unsigned long long int ulliData )
{
	sprintf( m_szConvertBuffer, "%llu", ulliData );
	transmit( m_szConvertBuffer );
}

//////////////////////////////////////////////////////////////////////////
void USART0::transmit( float fData )
{
	sprintf( m_szConvertBuffer, "%f", static_cast<double>( fData ) );
	transmit( m_szConvertBuffer );
}

//////////////////////////////////////////////////////////////////////////
void USART0::transmit( double dData )
{
	sprintf( m_szConvertBuffer, "%f", dData );
	transmit( m_szConvertBuffer );
}

//////////////////////////////////////////////////////////////////////////
void USART0::transmit( long double ldData )
{
	sprintf( m_szConvertBuffer, "%f", static_cast<double>( ldData ) );
	transmit( m_szConvertBuffer );
}

#ifdef SECOND_USART

//////////////////////////////////////////////////////////////////////////
USART1::USART1()
{
	m_vui8pUCSRA = &UCSR1A;
	m_vui8pUCSRB = &UCSR1B;
	m_vui8pUCSRC = &UCSR1C;
	m_vui8pUBRRH = &UBRR1H;
	m_vui8pUBRRL = &UBRR1L;
	m_vui8pUDR = &UDR1;
}

//////////////////////////////////////////////////////////////////////////
USART1::~USART1()
{}

#endif